Probably "If And When We Rise Again" by Streetlight Manifesto. That song has been stuck in my head for a while now, if only for the fact that it's got a (catchy) riff in there from Hungarian Dance No.5, but performed Ska/Punk-style. It's just too bad about the amount of Lyrical Dissonance in their music, though...catchy, upbeat-sounding songs, but often downer themes.